Draft attachment for chimneys or stacks.



RETAIJIATA, J". DRAFT} ATTACHMENT FOR CHIMNEYS 0a STACKS.

' APPLICATION FILED JAN 24, I914.

Patented Apr. 20,1915.

srrrrrns Parana orricn.

JOHN L. RETALIATA, .13., or DENVER, coronnno, .assrc'uvon or ONE-HALF r JOHN L.

BETALIATA, sn.

DRAFT ATTACHMENT FOR CHIMIQ'EYS OR STACKS.

Specification of Letters Patent.

Application filed January 24, 1914; Serial No. 814,036.

useful Improvements in Draft Attachments for Chimneys or Stacks; and I do declare the following to be a full, clearfandexact description .of the invention, such" as will enable others skilled in the art to which it appertains to make and use the same, reference being had to the accompanying drawings, and to the letters and figures of reference marked thereon, which form a part of this specification.

My invention relates to improvements in attachments for chimneys or stacks adapted to increase the draft thereof. This device is adapted to be applied to the top-of a chimney or other similar structure and secured by means of Wires or rods extending from opposite sides in the usual way, the lower extremity of the structure being adapted to fit over the top of the chimney.

In structure the device consists of a pipe or conduit to which is exteriorly applied a hood which is come shaped and increased in diameter as it-extends downwardly, its upper extremity bein fitted around-and .secured to the pipe. lommunicating with the space within the hood are openings in the pipe which lead to a space surrounding an interior cone shaped member whose lower extremity is closely fitted within the pipe.

struction, will proceed to described the same in detail, reference being made to the Patented Apr.20,1l915.

accompanying drawing, in which is illustrated an embodiment thereof.

In the drawing: Figure 1 is a side elevation of my improved attachment showing the same applied to the top of a chimney. Fig. 2 is asectional view taken through the portion of the device where the hood is located, the same being shown on a lai er scalethan in Fig. 1. Fig. 3 is a section ta en -0n the line 3-3,.Fig. 2 looking down- This cone shaped device diminishes insize as it extends upwardly, leavinga space between the same and the inner surface of the pipe. .The air which enters the hood passesthrough the perforations of the pipe into this space and thence upward y around top of the cone shaped member and within the body of the pipe producing enough suction to increase the draft to the desired dcgree. Projecting into the space surrounded by the hood and extending downwardly therefrom are vertically d sposed plates which separate. the space surroundin the pipe into a number of compartments. hese plates gather the air and guide it upwardly into the space between the howl and the-pipe,

whence it assesthrough thepipe perforations inte e space between tbeintcrior cone she ed member and the pipe, as heretofore ex fla ling briefly outlined my improved con wardly. I

' The same reference charactersindicate the same parts in all the views. 7

Let the numeral 5 designatethe base of my improved device, whose lower extremity 6 1S shapedto fit over the top of the chimney 7 to which it is applied. This base dimin-. ishes in size as it extends upwardly whereit merges into a pipe member 8 which may be of an suitable length. To this member 8 is as" I i detae ably applied a member 9 to which is exteriorly secured a hood 10, having the shape of the trustum of a cone, the smaller extremity of the hood beingsecured to the pipe member 9, as shownat 12.

The hood increases in size as it extends downwardly from the part 12. Secured to the pipe member 9 is a number of plates 13, whose upper extremities14 project into the space surrounded by the hood. These plates i are vertically. disposed and their inner edges are flanged as shown at'15, and rivetedto the member 9 as shown at 16. As illustra ted -in the drawing, there are four of these plates, dividing the space around the pipe into four approximately equal compartments. To these plates are applied spacing devices 17 consisting of arms whose opposite extremities are riveted to the blades between which they are located as shown at 18. These spacing devices give great strength to the plates and prevent them from being injured by the pressure of the air as it enters the compartments and passes lfipwardly into the space surroundedby'the 0 In order to support the attachment in place upon the top of the chimney, guy

wires or rods 19 are employed. The up r extremities of these wires are connected w1th the lower edge of the hood as shown at 20.

'In order tc give this tportionof the hood or the attachment of 10 the necessary strength pipe member 9'is provided with a number of perforations 22, through which the air after being gathered by the plates 13 and passing upwardly-into the hood, enters the "pipe member 9. "Within the portion of the frustum of a cone,

this member 9 surrounded by the hood, and.

extending somewhat I above the hood,'is an interior member 23 which has the shape of its smaller extremity being directed upwardly, while its lower extremity 'fitsclo ely within the pipe as shown at 24.

1 Between the lower extremity of the member 23 and the inner surface of the pipe there is a space 25 which increases in size *the top of to the top of the member 23. The air which enters the pipe through the perforations 22 passes'upwardly through this space around the member 23 and produces a partial vacuum which causes the air to rush upwardly through the chimney and through the pipe structure of my improvement. This member 23 is secured within the pipe by "the employment of angle brackets 26 which are offset intermediate their extremities as shown at 27 and extend upwardly and downwardly therefrom as shown at 28 and 29, the part 28 being riveted to the pipe member 9, while the part 29 is riveted to the top of the member23. A suflicient number of these brackets is employed'to securely {)asten the member 23 within the pipe memer 9. V/

-As illustrated in the drawing, my improved device iscomposed of'three distinct members, the base 5 and the part 8 of the pipe constituting one member, the part 9 a second member, and an upper part 30 athird member. This member 30 may be of any desired length and is preferably fitted around the upper portion of the member 9 above the hood and the interior member 23. Thisspecial construction, so far as the separation of the parts is concerned, is for con- 7 venience only hence, it is evident that the invention is not limited to this particular arrangement.

From the foregoin .of my improved dra t readily understood.

Assuming that the device is in place upon the chimney, as illustrated in Fig. 1, the wind or air current, coming from any direction, will enter one or two compartments between theplates 13 and will beguided upwardly into the hood. I

description the use attachment will be Above the upper extremities of the plates 14-the space between the hood and the pipe hood, the

ing the same,

member 9 is continuous'entirely around the pipe, whereby after the air current passes above the upper extremities of the plates, it is free to circulate entirely around the pipe within the hood and into the pipe through all of the perforations 22, thus allowing a relatively large volume of air to enter the space 25 between the interior member 23 and the inner surface of the pipe. This air within the space 25 is guided upwardly around the top of the last named member and produces a partial vacuum condition resulting in a relatively strong suction which acts upon the air within the chimney to increase the draft to the desired extent.

Having briefly described my invention, what I claim is:

1. A draft attachment for chimneys or stacks comprising a main pipe having an exterior frustum shaped hood surrounding the same, its smaller extremity being uppermost and closely fitting the main pipe to which it is attached, a frustum shaped pipe member located within. the main pipe and having its larger extremity lowermost and closely fitting the pipe which is provided with erforations, whereby the exterior space inclosed by the hood and the interior space between the frustum shaped pipe member and the body of the pipe are placed in communication, and vertically disposed plates attached to the pipe exteriorly and dividing the space around the main pipe and below the hood into compartments communicating at the top with the space within the upper extremities of the said plates extending into the last named space.

2. A draft attachment for chimneys or stacks comprising a main pipe having an exterior frustum shaped hood surrounding the same, its smaller extremity being uppermost and closely fitting the main pipe to which it is attached, a frustum shaped pipe member located within the main pipe and having its larger extremity lowermost and closely fitting the pipe which is provided with perforations, whereby the exterior space inclosed by the hood and the interior space between the frustum shaped pipe member and the body of the pipe are placed in communication, and plates attached to the pipe exteriorly and dividing the space around the main pipe and below the hood into compartments communicating at the top with the space within the hood, the upper extrfiiities of the said into the last named space, but terminating below the top of the hood, whereby the upper portion of the space within the hood and entirely around the main pipe is uninterrupted.

3. A draft attachment for chimneys or stacks comprising a main conduit having an exterior frustum shaped hood surroundits smaller extremity being up plates extending ineeeia M permost and closely fitting the pipe to which it is attached, a frustum shaped pipe member located within the main pipe and having its larger extremity lowermost and closely fitting the interior of the last named pipe which is provided with perforations, whereby the exterior space within the hood and the interior space between thefrustum shaped pipe member and the body of the pipe, are placed in communication, and plates attached'to the main pipe exteriorly and dividing the space around the pipe and below the hood into compartments communicating at the top with the space within the hood, the upper extremities of the said piates entering the space within the hood,

ut terminating below the perforations of the main pipe, whereby the upper portion of the space Within the hood and in the zone of the perforations is uninterrupted entirely around the pipe.

4. A draft attachment for chimneys comprising a main pipe, a hood having the shape of a frustum of a cone applied to the main pipe, its smaller'extremity being uppermost and fitting closely around the pipe where it is attached, a pipe member located within the main pipe and also having'the shape of a frustum of a cone, its larger extremity being lowermost and fitting closely within the pipe, the latter being perforated, whereby the space within the hood around the main pipe, and the space within the main pipe and around the said interior pipe member are placed in communication with each other, and means applied to the main pipe for dividing the space around the latter and means projecting upwardly into the lower portion of the space within the hood, whereby the upper portion of said space is uninterrupted entirely around the pipe.

In testimon whereof I afiix my signature in presence of two witnesses.

. JOHN L. RETALIATA, JR.

Witnesses:

A. EBnRT OBRIEN, A. J. OBmnn.

flopies of this patent may be obtained for five cents each, by addressing the Gommissioner of Patents,

, Washingtom'hfi. 

